Cone-pulley speed-changing gear.



No. 781,978. PATENTED FEB. 7. 1905. J. A. WHITE.

GONE PULLEY SPEED CHANGING GEAR.

APPLIUATION FILED MAR. 30, 1904.

2 sums-sum 1.

No. 781,978. PATENTED FEB. 7, 1905. J. A. WHITE.

GONE PULLEY SPEED CHANGING GEAR.

APPLIOATION FILED MAR. 30, 1904.

a sums-sum 2.

UNITED STATES Patented February 7, 1905.

PATENT OFFICE,

JOSEPH ATTVOOD \VHITE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEMOORE AND \VHITE COMPANY, OF PHILADELPH1A, PENNSYL- VANIA, A CORPORATIONOF PENNSYLVANIA.

CONE-PULLEY SPEED-CHANGING GEAR.

SPECIFICATION forming part of Letters Patent No. 781,978, dated Feb a y7, 1905.

Application filed March 30, 1904. Serial No. 200,321.

To all 1071 0271 may concern:

Be it known that I, JOSEPH A'rwoon WVHITE, a citizen of the Uni-tedStates, residing in Philadelphia, Pennsylvania, have invented certainimprovements in Cone-Pulley Speed-Changing G-ears, of which thefollowing is a specification.

The object of my invention is to properly support the transforming-beltsof a cone-pulley speed-changing gear such as illustrated and claimed inthe patent granted to me on the Zith day of June, 1902, No. 703,359.

This object I attain in the following manner, reference being had to theaccompanying drawings, in which Figure 1 is a plan view of a cone-pulleyspeed-changing gear, illustrating my invention. Fig. 2 is a sectionalview on the line 2 2, Fig. 1.

A and B are cone-pulleys. The shaft A of the pulley A is mounted insuitable bearings u, and the shaft B of the pulleyB is mounted inbearings 7). O is the driving-belt, which passes around both pulleys.Mounted between the cone-pulley A and the driving-belt t. is atransforming-belt D, and between the belt O and the pulley B is atransforming-belt l.) These two belts are identical in form.

Each is made of a body (l, to which are at tached the projectingsegments [1. Each of these sections is tapered as described in thepatent alluded to above, so that the transforming-belt will conform tothe surface of the pulley, while the back of the belt will conform tothe driving-belt C. The transforming-belts are made larger in diameterthan their cone-pulleys A and B, so that they can be adjusted to anypoint on the pulleys, and heretofore the loose portion of each belt wasallowed to run freely without a support and was adjusted by ashifter-arm bearing directly against the edges of the belt. Thisconstruction is objectionable, especially when the mechanism is large. Iovercome the objections by providing a supplementary conepulley for eachtransforming-belt, which supports the belt and through which the beltcan be shifted.

In the present instance, E is a bed-plate having rails v, on which aremounted the 5 wheels f of the shifter-frame F. The frame has lips f,which extend under the heads of the rails to prevent the frame lifting.

Mounted in hearings on the bed-plate E is a feed-screw (1, having awheel by which it is turned. This screw meshes with a nut on theshifter-frame E, so that on turning the screw the frame F can be movedon the rails.

On the shifter-frame Fare two cone-wheels l 1, which act as supplementalsupports for the transforming-belts. The shafts of the wheels 1 l aremounted in vertically-adjustable bearings f on the frame F, and thewheels preferably have flanges I, one at each 5 side, although theflange at that side of the wheel of the greatest diameter may bedispensed with in some instances.

The taper of the cone-wheels l l. is the same as the taper on thepulleys A and I3, and the 7 angle of the screw G- and the rails c 4* issuch that the shifter-frame F can be moved along the faces of thecone-pulleys A and B without placing tension on the tranforming-beltsl.) l) or allowing the belts to have too much slack.

\Vhen it is desired to change the speed of the driven shaft, all that isnecessary is to shift the frame 11 by turning the screw. If the frame isshifted in one direction, the flange on one side of one of thecone-wheels 30 will bear upon the transforming-belt, while the flange fof the other wheel will bear upon its transforming-belt, and the lateralthrust upon the belt will causeit to shift on its conepulley, eitherincreasing or diminishing the 5- speed of the driven shaft, according tothe direction of movement of the shifting frame.

I find that the flange 1" of the cone-pulleys need not be used in allcases, as the taper of l the cone is sufficient to keep the belt from 9moving laterally without the use of a flange; but I prefer to providethe small ,end of the conical pulley with the flange as it keeps thetransforming-belt in proper alinement and acts to shift the belt whenthe shifterframe F is moved.

On each bearing is a guard-plate 2Z extending beyond the flanges i i ofthe cone-wheels 1 I to prevent the transforming-belt crawling on top ofthe flanges if by accident they should become slack. The guard-platesmay be used in place of the flanges when plain pulleys are used.

It will be seen by the above description that I provide suitablesupports for the loose end of each transforming-belt and that throughthese supports the belts are shifted so as to change the speed of thedriven shaft. Furthermore, by this construction I can keep thetransforming-belts under control and do not have to use a shifter tocontact with the driving-belt U.

The speed-change gear shown in the drawings is intended for heavy workand is mounted on the floor or other suitable support; but it will beunderstood that the mechanism may be mounted on the ceiling or on thewall without departing from my invention.

1 claim as my invention 1. The combination in a speed-change gear,

of a cone-pulley, a driving-belt, a transforming-belt mounted betweenthe cone-pulley and the driving-belt, and a supplemental support for theslack end of the transforming-belt to keep it out of contact with thedriving-belt, substantially as described.

2. The combination of a cone-pulley, a driving-belt, a transforming-beltmounted between the cone-pulley and the driving-belt and larger than thecone-pulley, with a cone-wheel forming a supplemental support for theslack end of the transforming-belt, substantially as described.

3. The combination of a cone-pulley, a drivingbelt,a transforming-beltmounted between the driving-belt and the cone-pulley, a conewheel havinga flange at the side of the least diameter and acting as a supplementalsupport for the transforming-belt, substantially as described.

4.. The combination of a cone-pulley, a driving-belt, a supplementalbelt mounted between the driving-belt and the cone-pulley, a conewheelacting as a supplemental support for the transforming-belt, said wheelhaving a flange at each side, substantially as described.

5. The combination of a driving and a driven cone-pulley, a drivingbeltpassing around both pulleys, a transforming-belt for each cone-pulleyand mounted between the pulley and the driving-belt, saidtransforming-belts being larger than their pulleys, a shifterframe,cone-wheels mounted on said frame and acting as supplemental supportsfor the transforming-belts, substantially as described.

6. The combination of adriving and a driven shaft, a cone-pulley on eachshaft, 2. drivingbelt passing around both cone-pulleys,atransforming-belt for each pulley, said belts being mounted between thepulley and the drivingbelt and being tapered in cross-section so as toconform to the face of the pulley, the bearing-face and thedriving-belt, a shifting frame and two conical wheels mounted on saidframe and acting as supplemental supports for the transforming-belts,said wheels having flanges, substantially as described.

7. The combination of a driving and a driven shaft, a cone-pulley oneach shaft, a drivingbelt passing around both pulleys,transforming-belts mounted between each pulley and the driving-belt,each transforming-belt being larger than the cone-pulley, conical wheelsacting as supplemental supports for the transforming-belts, ashifter-frame, diagonal rails for the shifter-frame, and adiagonally-arranged screw engaging the frame, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSEPH ATWOOD WHITE.

l/Vitnesses:

l/VILL. A. BARR, Jos. H. KLEIN.

